Bone-holder



May 24, 1932.

G. c. BRAUMULLER BONE, HOLDER Fil ed Jan. 23. 1929 Patented May 24, 19 32 GEORGE CHRISTIAN BRAUMULLERQoF NEwA Rk; ew iEItSEY BONE-HOLDER V Application filed January 23,1929; Serial M1334 1 The invention relates to devices which are attached to a butchers meat-cutting block for the purpose of holding bones and the like rigidly while they are beingcut with a saw,

and the object, of the present improvement is to provide such a device with a movable bone-holding jaw which maybe very readily" swung froman operative position to an inoperative position where it-will be out of the 10 way, leaving the block surface entirely clear while the device is not in use, at thesame:

time providing that the jaw, when placed in an operative position, will have allthe rig idity of a non-movable jaw. Further ob jects are durability andcheapness of manu,

facture. v c In the drawings Figure 1 represents a 7 front view of the movable jaw member; Figure 2 is an upward view of themovable 2G jaw member taken on Figure 1. Figure3 represents a front view ofthe stationary member, or baseplate. Figure 4 is an upward view of the stationary baseplate, taken on Figure 3. V Figure '5 is a front elevation 0t.

the device assembl di The movable jaw member is formedofa suitable material of uniformithickness, its

upper portion,- 12, or jaw, being preferably serrated as indicated by drawing in order to L3 efiectively grip the bone. Its lower portion, or shank, 6, which I shall call the bolt, tapers gradually in width from its upper to lower j extremities, and a slot 7 is formed through its center. The, right band edge otthe bolt is bevelled, asindicated more clearlyinFigure 2. 1 V

V The stationary member,.or base plate, 0011+ sists of a'flat plate, in which'screw holes "9 are provided to permit its being rigidly'fixed 40 to the meat-cutting block; Two lockinglugs. 10 and 11 are integrally formed upon the plate ners.

member, and their left hand edges are undercut at an angle coincidin withthean gle of.

the bevel given tothe e ge otthe tapered 7 bolt 6 of the movable jaw member.

5 V The movable jaw memberiis superimposed tionary member with sufficientplooseness and freedom as to permit the movable member to at its upper and lower left handcon" V As indicated by-Figure 4,'these lugs have a projection from the face of the plate equal to the'thickness of the =movable=jaw upon the stationary baseplate and connected it: i 1 l to it by a headed pivot 8 through the slot 7, so that the movable jaw member has a vertical motion with relation to the stationary I 7 member in addition to its pivoting motionga about the pivot 8.

' When the movable jaw member'israisedto I '7 c its operative position,fitszweight willpause it to dropupon itsflpivot so thatthelower end of the bolt 6 falls slightly below'the upper edge of the lug 11,-? whereby the movable member becomes looked through the wedging action of, the lugs 10 and 11 upon thetapered 1 bolt 6, forcing it against the pivot8; In this V p 7 1 position, absoluteyrigidityr-is securedby-the-fi, 3 combined separate wedging effects of the taper and ofthe bevelled edge of the bolt 6, the taper-taking up the side play between the pivot 8 and the lugslQ and-1 1, by wedging the bolt Gagainst the pivot, while the bevelled edge prevents any twistingot the bolt 6 arising from the play betweenthe pivot '8 j v v andthe slot 7. By this means, it is possible to connect the mov'able;'member tothe sta1..

be thrownintO and outjof, an operjative position very easily and quiokly, at thefsame' time t securing absolute immobility-when the mem bersare engaged-in operative'position. To V 8!! disengage the movable member, itis raised. I p 1 slightly so thatthe lower endof bolt 6,,clea'r-, I V ingthe upper edgebf filleflug 11, describes,

an are between the lugs 10 and Has the'jaw is swung to'lone side and fallsto its inoperatime position, below thesurfac'e'of the, meatcutting block, as indicated by the dottedlines i 'in Figure.5.' Q M 1.-"Afolding benohvise, comprisinga tionary baseplate anda iboltbperativel mounted thereon, said plate'havingsajpivqt pin and two lugs proj ecting" from one face fthereof, the lugs beingvertic'ally spacedlfrom each other and having theirendsllongia tudinally spaced from the pivot pin, said;

nbol -tihaving alongitudinal slot therein '-adj'a-' jcent oneend thereofthro ugh; which the pivot pin projects, saidsl'ot termin'atingi at a dis- "1 1 tance from the en'd'jof the bolt' equaltoless j than the distance :ffomi the pivot pin to the adjacentends of the lugs, the slotted end of the bolt being wedge-shapedrand cooperating I g p with the pivot pin andlugs when in operative position to form a wedging action.

2. A folding bench vise as in claim 1, the ends of the lugs adjacent the pivot ;.pin loeing nndercut=to coincide: with a; ibevel formed upon the edge of the bolt. 7

- GEORGE CHRISTIAN BRAUMULLER. 

